Load regulation circuit and load regulation device employing the same

Abstract

A load regulation circuit used for calibrating a voltage drop tester includes a voltage control switch, a first resistor group, a power control switch and a second resistor group electrically connected to the first resistor group through the power control switch. When the voltage control switch is switched on to different positions, the first resistor group provides different loads and load voltages for the voltage drop tester. When the power control switch is turned on or off, the first resistor group and the second resistor group provide corresponding loads and load powers for the voltage drop tester to calibrate and correct operating parameter of the voltage drop tester. The load regulation circuit can simulate and replace different electronic device to calibrate the voltage drop tester.

1 . A load regulation circuit for calibrating a voltage drop tester, the load regulation circuit comprising:
 a circuit assembly electrically connected to the voltage drop tester; and   a switch assembly electrically connected to the circuit assembly, wherein the switch assembly is selectably turned on or off, the circuit assembly provides corresponding loads and outputs different load voltages and load powers for the voltage drop tester to calibrate and correct operating parameter of the voltage drop tester.   
     
     
         2 . The load regulation circuit as claimed in  claim 1 , wherein the switch assembly comprises a voltage control switch and a power control switch, the voltage switch controls and switches the load voltages of the circuit assembly, and the power control switch controls and switches the load powers of the circuit assembly based on feedback results of the voltage drop tester. 
     
     
         3 . The load regulation circuit as claimed in  claim 2 , wherein the circuit assembly comprises a first resistor group and a second resistor group, the first resistor group is electrically connected to a power source through the voltage control switch, and the second resistor group is electrically connected to the first resistor group through the power control switch to provide different loads for the voltage drop tester. 
     
     
         4 . The load regulation circuit as claimed in  claim 3 , wherein the first resistor group comprises a first resistor module, a second resistor module, a third resistor module, and a fourth resistor module, the voltage control switch comprises s pole and a first contact, a second contact, a third contact and a fourth contact, the pole is electrically connected to the cathode of the power source, the first contact is electrically connected between the first resistor module and the second resistor module, the second contact is electrically connected between the second resistor module and the third resistor module, the third contact is electrically connected between the third resistor module and one end of the fourth resistor module, and the fourth contact is electrically connected to other end of the fourth resistor module. 
     
     
         5 . The load regulation circuit as claimed in  claim 4 , further comprising a power switch connected between the first resistor module and the power source, wherein the power switch is turned on, when the pole is switched on to connect to the first contact, the first resistor module connects to the power source, and provides a first load voltage, when the pole is switched on to connected to the second contact, the first resistor module and the second resistor module are in series and are connected to the power source and provide a second load voltage. 
     
     
         6 . The load regulation circuit as claimed in  claim 5 , wherein when the pole is switched on to connected to the third contact, the first resistor module the second resistor module and the third resistor module are in series and are connected to the power source and provide a third load voltage, when the pole is turned on to connected to the fourth contact, the first resistor module, the second resistor module, the third resistor module and the fourth resistor module are connected in series to the power source and provide a fourth load voltage to the voltage drop tester. 
     
     
         7 . The load regulation circuit as claimed in  claim 4 , wherein the second resistor group is the substantially same as the first resistor group, the second resistor group comprises a first resistor module, a second resistor module, a third resistor module, and a fourth resistor module electrically connected to the first resistor module, the second resistor module, the third resistor module and the fourth resistor module of the first resistor group through the power control switch, and when the power control switch is switched on or off, the first resistor group electrically connects to or disconnects from the second resistor group. 
     
     
         8 . The load regulation circuit as claimed in  claim 7 , wherein the power control switch comprises four sub-switches connected between the first resistor group and the second resistor group, when the four sub-switches are turned off, the first resistor group is disconnected from the second resistor group, the first resistor group provides and outputs a first load power, when the sub-switches are turned on, the first resistor group is electrically connected to the second resistor group, and provides a second load power to the voltage drop tester. 
     
     
         9 . A load regulation circuit for calibrating a voltage drop tester, comprising:
 a voltage control switch electrically connected to the voltage drop tester;   a first resistor group electrically connected to the voltage drop tester through the voltage control switch;   a power control switch electrically connected to the first resistor group; and   a second resistor group electrically connected to the first resistor group through the power control switch, wherein when the voltage control switch is switched on to different position, the first resistor group provides different loads and load voltages for the voltage drop tester, when the power control switch is turned on or off, the first resistor group and the second resistor group provide corresponding loads and load powers for the voltage drop tester to calibrate and correct operating parameter of the voltage drop tester.   
     
     
         10 . The load regulation circuit as claimed in  claim 9 , wherein the first resistor group comprises a first resistor module, a second resistor module, a third resistor module, and a fourth resistor module, the voltage control switch comprises s pole and a first contact, a second contact, a third contact and a fourth contact, the pole is electrically connected to the cathode of the power source, the first contact is electrically connected between the first resistor module and the second resistor module, the second contact is electrically connected between the second resistor module and the third resistor module, the third contact is electrically connected between the third resistor module and one end of the fourth resistor module, and the fourth contact is electrically connected to other end of the fourth resistor module. 
     
     
         11 . The load regulation circuit as claimed in  claim 10 , further comprising a power switch connected between the first resistor module and the power source, wherein the power switch is turned on, when the pole is switched on to connect to the first contact, the first resistor module connects to the power source, and provides a first load voltage, when the pole is switched on to connected to the second contact, the first resistor module and the second resistor module are in series and are connected to the power source and provide a second load voltage. 
     
     
         12 . The load regulation circuit as claimed in  claim 11 , wherein when the pole is switched on to connected to the third contact, the first resistor module the second resistor module and the third resistor module are in series and are connected to the power source and provide a third load voltage, when the pole is turned on to connected to the fourth contact, the first resistor module, the second resistor module, the third resistor module and the fourth resistor module are connected in series to the power source and provide a fourth load voltage to the voltage drop tester. 
     
     
         13 . The load regulation circuit as claimed in  claim 10 , wherein the second resistor group is the substantially same as the first resistor group, the second resistor group comprises a first resistor module, a second resistor module, a third resistor module, and a fourth resistor module electrically connected to the first resistor module, the second resistor module, the third resistor module and the fourth resistor module of the first resistor group through the power control switch, and when the power control switch is switched on or off, the first resistor group electrically connects to or disconnects from the second resistor group. 
     
     
         14 . The load regulation circuit as claimed in  claim 13 , wherein the power control switch comprises four sub-switches connected between the first resistor group and the second resistor group, when the four sub-switches are turned off, the first resistor group is disconnected from the second resistor group, the first resistor group provides and outputs a first load power, when the sub-switches are turned on, the first resistor group is electrically connected to the second resistor group, and provides a second load power to the voltage drop tester. 
     
     
         15 . A load regulation device for calibrating drop voltage and drop time of a voltage drop tester, the load regulation device comprising:
 a housing;   a circuit board received within the housing;   a voltage control switch located on the circuit board and electrically connected to the circuit board and the voltage drop tester;   a first resistor group located on the circuit board and electrically connected to the voltage drop tester through the voltage control switch;   a power control switch located on the circuit board and electrically connected to the first resistor group; and   a second resistor group located on the circuit board and electrically connected to the first resistor group through the power control switch, wherein when the voltage control switch is switched on to different position, the first resistor group provides different loads and voltages for the voltage drop tester, when the power control switch is turned on or off, the first resistor group and the second resistor group provide corresponding loads and powers for the voltage drop tester, and the loads, the voltages and the powers are capable of calibrating and correcting operating parameter of the voltage drop tester.   
     
     
         16 . The load regulation device as claimed in  claim 15 , wherein the first resistor group comprises a first resistor module, a second resistor module, a third resistor module, and a fourth resistor module, the voltage control switch comprises s pole and a first contact, a second contact, a third contact and a fourth contact, the pole is electrically connected to the cathode of the power source, the first contact is electrically connected between the first resistor module and the second resistor module, the second contact is electrically connected between the second resistor module and the third resistor module, the third contact is electrically connected between the third resistor module and one end of the fourth resistor module, and the fourth contact is electrically connected to other end of the fourth resistor module. 
     
     
         17 . The load regulation device as claimed in  claim 16 , further comprising a power switch connected between the first resistor module and the power source, wherein the power switch is turned on, when the pole is switched on to connect to the first contact, the first resistor module connects to the power source, and provides a first load voltage, when the pole is switched on to connected to the second contact, the first resistor module and the second resistor module are in series and are connected to the power source and provide a second load voltage. 
     
     
         18 . The load regulation device as claimed in  claim 17 , wherein when the pole is switched on to connected to the third contact, the first resistor module the second resistor module and the third resistor module are in series and are connected to the power source and provide a third load voltage, when the pole is turned on to connected to the fourth contact, the first resistor module, the second resistor module, the third resistor module and the fourth resistor module are connected in series to the power source and provide a fourth load voltage to the voltage drop tester. 
     
     
         19 . The load regulation device as claimed in  claim 16 , wherein the second resistor group is the substantially same as the first resistor group, the second resistor group comprises a first resistor module, a second resistor module, a third resistor module, and a fourth resistor module electrically connected to the first resistor module, the second resistor module, the third resistor module and the fourth resistor module of the first resistor group through the power control switch, and when the power control switch is switched on or off, the first resistor group electrically connects to or disconnects from the second resistor group. 
     
     
         20 . The load regulation device as claimed in  claim 19 , wherein the power control switch comprises four sub-switches connected between the first resistor group and the second resistor group, when the four sub-switches are turned off, the first resistor group is disconnected from the second resistor group, the first resistor group provides and outputs a first load power, when the sub-switches are turned on, the first resistor group is electrically connected to the second resistor group, and provides a second load power to the voltage drop tester.